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Thread: Precision measurement
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31st Jan 2020, 05:22 PM #1Golden Member
- Join Date
- Mar 2012
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- Western NSW
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- 543
Precision measurement
Its just too hot here to do anything outside, so I thought I'll bring some stuff down from the shed to play with in the house.
Some years ago I brought a laser interferometer at the Broens engineering auction in Sydney. Broens was a huge concern and made parts for the F35 strike fighter along with other high end customers. I don't know what happened but it looked like it closed very suddenly. Anyway I brought a number of fantastic pieces from this sale. One of which was the laser interferometer. Luckily it was very poorly described and photographed so it was not obvious without very close inspection what it was. Because of this it went very cheaply. Luckily it was complete with the optics for distance measurement,angle measurement and flatness. I did play with it a bit when I first got it but since I have been building the shed it has sat in a cupboard. It came in 3 big travel cases which have started to get the dreaded foam cancer so I decided to take them out and clean the pieces and remove the deteriorating foam. But of course had a good play and everything still seems to work fine. Here are some pictures
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IMG_2117.jpg I did goggle what that would be in todays money and it came back at $154,000!!
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IMG_2119.jpg
IMG_2120.jpg The resolution is 0.01 micron or 1 microinch
IMG_2121.jpg The other thing I brought down was some long series guage blocks. This set goes to 1000mm. Wanted to check the rust proofing paper.
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Hope you enjoyed these pictures.
Keep praying for rain
Cheers
Mark
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31st Jan 2020, 05:30 PM #2Senior Member
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- Sep 2019
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- Newcastle, AU
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Wow, that's quite the find! Thanks for sharing those pics, that's really interesting (along with the receipt... $154k!)
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31st Jan 2020, 06:05 PM #3Most Valued Member
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- Mar 2011
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- Southern Flinders Ranges
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- 1,536
I went to the Broens auction in Adelaide. All the metrology equipment sold for stupid money as did the smaller machines. It’s where the plates on top of my fixture table came from.
Very nice piece of kit you picked up
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1st Feb 2020, 03:16 AM #4Senior Member
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- Aug 2007
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- Saskatoon, Saskatchewan, Canada
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- 292
Now you are all set to calibrate your CNC mills and coordinate measuring machines.
Pete
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1st Feb 2020, 12:45 PM #5Golden Member
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- Mar 2012
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- Western NSW
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1st Feb 2020, 01:47 PM #6Most Valued Member
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- Jun 2007
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- sydney ( st marys )
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In a climate controlled environment I would expect.
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2nd Feb 2020, 08:56 AM #7Golden Member
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- Mar 2012
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- Western NSW
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Haha
But seriously once the shed is finished I’ll hopefully show you what it is really used for. I have 4 granite and 2 cast iron surface plates to calibrate and some big machinery to level and install. Plus a few other jobs in the future
But it has cooled down a bit today so off to work on the shed crane.
cheers
Mark
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2nd Feb 2020, 04:46 PM #8future machinist
- Join Date
- Mar 2008
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- nowra
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- 1,598
That's interesting Mark. I have a mate who has the same laser inferometer. Hes repaired it but we are missing all optical reflectors to be able to do surface plate measurements. It turns out it's hard too find the missing reflectors.
BETTER TO HAVE TOOLS YOU DON'T NEED THAN TO NEED TOOLS YOU DON'T HAVE
Andre
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2nd Feb 2020, 05:31 PM #9Golden Member
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- Mar 2012
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- Western NSW
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